Cylindrical die apparatus for cutting blanks



Jan. 24, 1939. c. H. oHANsoN CYLINDRICAL DIE APPARATUS FOR CUTTING BLANKS Filed May 21, 1936 Patented Jan. 24, 1939 UNITED STATES PATENT OFFICE TING Carl Hugo Johanson, Los Angeles, Calif., assignor to Olivia S. Johanson, Los Angeles, Calif.

Application May 21,

9 Claims.

This invention is a method and apparatus for producing various blanks, of appropriate, stretchable material, such, for instance, as is used in the manufacture of gloves, though the invention is 5, not limited to the glove art.

In making gloves the material, for instance glove skin, is given a finalstretch in the length of the blank to be produced, that is, the trank, the thumb, the fourchette, and others as may be 10 needed according to the make-up of the glove, so that in the finished glove it will have the proper size length along the hand.

Preparing a glove skin for cutting of blanks is a difiicult and tedious labor when the old systems are employed to pull the glove skin for final cutting of the pieces. The stretch is seldom uniform throughout the skin.

It is an object of the present invention to eliminate the old method of stretching the skin by 20 hand and to provide a system and means wherein the skin is given but one tensional treatment to secure the desired elongation of the skin for its set for production of blanks ofpredetermined length according to size.

It is particularly an object of the invention to provide a method and an apparatus by which the goods, in sheet or pieces of sheet form is tensionally elongated so that it will be given a set length in one direction, that is lengthwise of the desired blank, andat the same time is cut to produce the desired blank or blanks, in one continuous operation of the glove sheet or piece.

It is, in this art, an object to provide means including relatively rolling, contiguous surfaces including die outlining blades to sever the blank desired from the stock sheet or piece and including means of an elastic, deformable character which will act concurrently with the cutting means to place the material at the cutting zone under a tensioning effort to efiect elongation of the material.

An object is to provide means operating with a rolling compressive, elongating and cutting-out effect on the glove material, in one simultaneous a; action.

The invention consists of certain advancements in this art as set forth in the ensuing disclosure and having, with the above, additional objects and advantages as hereinafter developed, and whose construction, combination and details of means, and the manner of operation, and the method involved, will be made manifest in the description of the herewith illustrative embodiment; it being understood that modifications, variations and adaptations may be resorted to will 1936, Serial No. 81,009

within the scope, principle and spirit of the invention as it is more directly claimed hereinafter.

Figure 1 is a side elevation of a cylindrical die device incorporating the invention. Figure 2 is a transverse section of the die and a cylindrical platen therefor. Figure 3 is a developed plane for a cylindrical die for production of a plurality of each of various glove blanks from a sheet of material of requisite size. Figure 4.- is a sectional detail tranversely of a pair of related cutting blades and interposed cushion bedding therebetween. Figure 5 is a detail section taken along the direction of the blades and the bedding, this in the form of inserted cross bars. Figure 6 is a detail of a. cylinder bedding of continuous form. Figure 7 is a detail showing a button form of cushion means.

As here shown a die cylinder 2 of any desired size, according to the desired product, is provided with one or more systems of cutting blades 3, each blade system defining, in plan, a blank of the desired pattern to be produced. In Fig. 1 a plurality of blades are grouped side by side and extend with their length cylindrically around the body or cylinder 2; it being understood that the grouping will be such as to most economically cut the pieces desired from the available stock. The cutting blades of Fig. 1 are designed for conventional fourchettes of gloves; the intermediate blades 3 of the group serving to cut the sides of two adjacent fourchettes reversed endwise in the cylinder group, this being possible because of the taper of the sides of the fourchettes and their equal length in this case.

A center slitting blade 4 lies longitudinally of each fourchette cutting unit of the die, as in ordinary plane edge dies.

Ihus the effective cutting edge of the blades 3 of the body 2 lie in a true circle at 3 and rotate in close contiguity to an opposing platen device which is preferably in the form of a cylinder l0 turning with the same surface speed as the cutting edges of the die blades, substantially, during the operation of the device.

The die roller '2 and the platen Ill may be suitably driven, each separately or one by the action of the other when the material being worked on is fed thereto, and means is provided to effectively grip the advanced edge of the sheet of material indicated by the dotted line S and to hold the edge during the rotation of the co-operative members 2-l0. Such means is shown as a clamp bar I I tilting in a longitudinal throat I2 in one of the members 2-I0, in this case the platen ID. The bar II is fixed on a rock-shaft I3 having on its outer end a suitably operated lever M which may be a hand crank. The rock-shaft is here shown as firmly latched in its closed position by a simple spring arm l engaging a facet l6 of the hub of the lever l4; though any other suitable form of gripping device may be adopted; the bar ll being shown in open position in Fig. 2 for insertion of the goods S, a glove skin for instance.

A feature of the invention resides in the provision of a filler or bedding in the spaces between the die blade system relative to each full glove blank intended to be cut by the cylindrical die a device. Such bedding is preferably made of rubber or its equivalent of such a degree of hardness that as the goods moves in between the coacting roller members 2-! B such tension will be applied to the skin that it will be uniformly elongated while it is being cut. In order to insure this effect of stretching or elongating the skin while the die is cutting, the rubber bars or filling have a peripheral face lying a suitable distance beyond the effective cutting edge of the die blades 3.

Figs. 4 and 5 show a form of die bed as consisting of transverse bars 8, from blade to blade, with their faces 8* a suitable distance beyond the cutting edges of the blades. Fig. 6 shows a form in which the bed is a continuous piece 5 for the length of the relative blank cutting die; that is, the die blade outline for a given piece or blank. Fig. 7 shows isolated rubber buttons 6 disposed along the space between the blades of the die cylinder.

As the rubber bedding device on the die 2 moves into contact with the rigid face of the platen H], at the zone of contact of the blade edge with the skin, the rubber is deflected or flexed enough to exert a distinct elongating or stretching effort on the skin as this is passed between the die cylinder and the platen at and along their tangential, contiguous zone along the plane in which their axes lie. It is understood that the bars 8 may be arranged close together or spaced apart as desired and project as much beyond the blade edge as desired so as to have the desired degree of flexure and resultant tension on the engaged area of the skin as determined best in given cases according to the nature of the material being cut into patterned blanks.

A function of the elastic bedding means is to act in an ejecting manner to displace the cut and stretched blanks from the die device following the severance of the blank as this issues from the cutting zone between the die and the platen.

In Fig. 3 there is shown, in plane projection, a die system for a cylindrical rolling and cutting member 20 for use on a sheet of material shown in part by dotted lines S. In this die are blade groups 3 for fourchettes 2!, thumbs 22 and tranks 23; these being shown as severally arranged vvith their lengths around the (projected) cylinder member 20.

It will be seen, therefore, that by this method the material being operated upon is simultaneously subjected to a tensional elongating effort by displacement of the rubber projecting beyond the cutting edge of the die at the zone in opposition to the proximate area of the contiguous platen, and to a cutting effect of the edges of the blades as these approach and pass the tangential zone between the members 2 and I0.

What is claimed is:

1. In a machine for working glove or other soft leather, a mechanism including a device to grip an interposed piece of leather, and a cooperative mechanism provided with a rubber bed portion composed of a system of relatively free, contiguous, bodily yieldable pads each presenting a deformative face for reactive support of the interposed leather and whereby to exert a stretching reaction on the leather and relatively draw it as to the gripping device.

2. In a leather working machine, a re-action member provided with a yieldable rubber bed which is transversely subdivided into a system of relatively free, contiguous pads presenting laterally and longitudinally yieldable, isolated faces for re-active support of the applied leather and a stretching device including a gripper to hold the leather while it is subjected to a stretching eifort by reaction of said pads.

3. In a machine for working skins of soft leather, a member provided with a row of symmetrically arranged, relatively free, deformable pads of rubber having faces for re-active effect on the applied skin and a gripping device coacting with the pads to exert a stretching effort on an interposed leather.

4. A device as set forth in claim 3, and said pads being in the form of isolated nogs.

5. In a leather working machine, a member having a leather supporting zone consisting of a symmetrical arrangement of contiguous, resilient nogs having faces for re-active effect on the applied skin and a gripping device coacting with the member to effect a stretching of the interposed leather.

6. A leather working machine member as set forth in claim 5, and in which the nogs are arranged in parallel rows having contiguous relation.

7. A leather working machine member as in claim 5, and in which the nogs are arranged in parallel rows in which they are relatively staggered and are laterally unsupported so that under compression re-action by the applied leather they may flow in any lateral direction.

8. A re-action member for a leather working machine provided with a cushioning means comprising a plurality of parallel rows of isolated, circular, yieldable pads adapted for lateral displacement in any direction under compression load by applied leather; said pads being in contiguity and a cooperative gripping device to hold the leather and eifect a stretching reaction thereof while supported on the pads.

9. A pad member as in claim 8, and the isolated pads being arranged in staggered relation as to contiguous rows.

CARL HUGO JOHANSON. 

